81728000

素因数分解:

$2^9\times 5^3\times {\mathrm{1277}}^1$

素因数の和:1310

約数の個数: 80

約数和(自身を含む): 203953464

約数和(自身を除く): 122225464

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 125, 128, 160, 200, 250, 256, 320, 400, 500, 512, 640, 800, 1000, 1277, 1280, 1600, 2000, 2554, 2560, 3200, 4000, 5108, 6385, 6400, 8000, 10216, 12770, 12800, 16000, 20432, 25540, 31925, 32000, 40864, 51080, 63850, 64000, 81728, 102160, 127700, 159625, 163456, 204320, 255400, 319250, 326912, 408640, 510800, 638500, 653824, 817280, 1021600, 1277000, 1634560, 2043200, 2554000, 3269120, 4086400, 5108000, 8172800, 10216000, 16345600, 20432000, 40864000, 81728000]

約数ペア:

[(1, 81728000), (2, 40864000), (4, 20432000), (5, 16345600), (8, 10216000), (10, 8172800), (16, 5108000), (20, 4086400), (25, 3269120), (32, 2554000), (40, 2043200), (50, 1634560), (64, 1277000), (80, 1021600), (100, 817280), (125, 653824), (128, 638500), (160, 510800), (200, 408640), (250, 326912), (256, 319250), (320, 255400), (400, 204320), (500, 163456), (512, 159625), (640, 127700), (800, 102160), (1000, 81728), (1277, 64000), (1280, 63850), (1600, 51080), (2000, 40864), (2554, 32000), (2560, 31925), (3200, 25540), (4000, 20432), (5108, 16000), (6385, 12800), (6400, 12770), (8000, 10216)]